IDE=Integrated Drive Electronics.
Developed by Compaq and Western Digital.
Newer version of IDE goes under the name ATA=AT bus Attachment.
 (at the controller & peripherals)
 (at the controller & peripherals)
 (at the cable)
 (at the cable)
40 PIN IDC MALE at the controller & peripherals.
40 PIN IDC FEMALE at the cable.
| Pin | Name | Dir | Description | 
|---|---|---|---|
| 1 | /RESET |  | Reset | 
| 2 | GND |  | Ground | 
| 3 | DD7 |  | Data 7 | 
| 4 | DD8 |  | Data 8 | 
| 5 | DD6 |  | Data 6 | 
| 6 | DD9 |  | Data 9 | 
| 7 | DD5 |  | Data 5 | 
| 8 | DD10 |  | Data 10 | 
| 9 | DD4 |  | Data 4 | 
| 10 | DD11 |  | Data 11 | 
| 11 | DD3 |  | Data 3 | 
| 12 | DD12 |  | Data 12 | 
| 13 | DD2 |  | Data 2 | 
| 14 | DD13 |  | Data 13 | 
| 15 | DD1 |  | Data 1 | 
| 16 | DD14 |  | Data 14 | 
| 17 | DD0 |  | Data 0 | 
| 18 | DD15 |  | Data 15 | 
| 19 | GND |  | Ground | 
| 20 | KEY | - | Key | 
| 21 | n/c | - | Not connected | 
| 22 | GND |  | Ground | 
| 23 | /IOW |  | Write Strobe | 
| 24 | GND |  | Ground | 
| 25 | /IOR |  | Read Strobe | 
| 26 | GND |  | Ground | 
| 27 | IO_CH_RDY |  | |
| 28 | ALE |  | Address Latch Enable | 
| 29 | n/c | - | Not connected | 
| 30 | GND |  | Ground | 
| 31 | IRQR |  | Interrupt Request | 
| 32 | /IOCS16 | ? | IO ChipSelect 16 | 
| 33 | DA1 |  | Address 1 | 
| 34 | n/c | - | Not connected | 
| 35 | DA0 |  | Address 0 | 
| 36 | DA2 |  | Address 2 | 
| 37 | /IDE_CS0 |  | (1F0-1F7) | 
| 38 | /IDE_CS1 |  | (3F6-3F7) | 
| 39 | /ACTIVE |  | Led driver | 
| 40 | GND |  | Ground | 
Note: Direction is Controller relative Devices (Harddisks).
| Contributor: | Joakim Ögren, Dan Williams | 
| Source: | ? | 
  Copyright © The Hardware Book Team 1996-2004.
  May be copied and redistributed, partially or in whole, as appropriate.
  Document last modified: 2002-01-10